User Guide

CHAPTER 7
140
Selecting
6 Continue to click and Alt/Option-drag to finish
selecting.
7 Close the selection border:
• Position the polygon lasso tool pointer over the
starting point (a closed circle appears next to the
pointer) and click.
• If the pointer is not over the starting point,
double-click the lasso tool pointer, or Ctrl-click
(Windows) or Command-click (Mac OS).
To use the magnetic lasso tool:
1 Select and double-click the magnetic lasso tool
( ) to display its Options palette, and select
options as described in the procedure on setting
options for the lasso, polygon lasso, and magnetic
lasso tools on page 141.
2 Click in the image to set the first fastening point.
Fastening points anchor the selection border in
place.
3 To draw a freehand segment, move the pointer
along the edge you want to trace. (You can also
drag with the mouse button depressed.)
The most recent segment of the selection border
remains active. As you move the pointer, the active
segment snaps to the strongest edge in the image.
Periodically, the magnetic lasso tool adds fastening
points to the selection border to anchor previous
segments.
4 If the border doesn’t snap to the desired edge,
click once to add a fastening point manually.
Continue to trace the edge and add fastening
points as needed.
Fastening points anchor selection border to edges.
5 To switch temporarily to the other lasso tools,
do one of the following:
• To activate the lasso tool, hold down Alt
(Windows) or Option (Mac OS) and drag with the
mouse button depressed.
• To activate the polygon lasso tool, hold down
Alt/Option and click.
6 To erase recently drawn segments and fastening
points, press Delete.
7 Close the selection border:
• To close the border with a freehand magnetic
segment, double-click, or press Enter (Windows)
or Return (Mac OS).
• To close the border with a a straight segment,
hold down Alt (Windows) or Option (Mac OS),
and double-click.